Bound to the Eight-Winged Seraph

In this world a person's standing comes from the spirit beasts they can summon and bind. Rio Frias arrives from somewhere else entirely and his first summon is a top-tier succubus, which should have set him up for life. She takes one look at the room, attaches herself to a wealthy man instead, and leaves. What she never learns is that Rio carries a system, and the system lets him evolve whatever he bonds with. His next pact is with an angel whose wings are broken, a creature nobody else would take, and the mockery that follows him is about a man so desperate he will accept damaged goods. He keeps feeding the angel through the system and says nothing while its wings come back in pairs.